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Albert Allen Bartlett gave more than 1,742 lectures on the threat of exponential population growth starting in 1969. [62] American biologist Paul R. Ehrlich generated renewed interest in the topic of overpopulation with The Population Bomb (1968). However, many predictions of overpopulation during the 20th century did not materialize.
The root problem in all but one of Diamond's factors leading to collapse is overpopulation relative to the practicable (as opposed to the ideal theoretical) carrying capacity of the environment. One environmental problem not related to overpopulation is the harmful effect of accidental or intentional introduction of non-native species to a region.
In environmental science, a population "overshoots" its local carrying capacity — the capacity of the biome to feed and sustain that population — when that population has not only begun to outstrip its food supply in excess of regeneration, but actually shot past that point, setting up a potentially catastrophic crash of that feeder population once its food populations have been consumed ...
Overpopulation or overabundance is a state in which the population of a species is larger than the carrying capacity of its environment. This may be caused by increased birth rates, lowered mortality rates , reduced predation or large scale migration , leading to an overabundant species and other animals in the ecosystem competing for food ...
Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation. The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [ 1 ]
In 2007, Jeffrey Sachs gave a number of lectures (2007 Reith Lectures) about population planning and overpopulation. In his lectures, called "Bursting at the Seams", he featured an integrated approach that would deal with a number of problems associated with overpopulation and poverty reduction. For example, when criticized for advocating ...
Population Control: Real Costs, Illusory Benefits is a nonfiction book by Steven W. Mosher, president of the Population Research Institute, first published in 2008. Population Control is a detailed exposition on the global effort to combat overpopulation , arguing that not only population control is immoral in many cases, but that ...
Barry Commoner argued that Ehrlich emphasized overpopulation too much as the source of environmental problems, and that his proposed solutions were politically unacceptable because of the coercion that they implied, and because they would cost poor people disproportionately.